Acer TravelMate 420 TravelMate 420 Service Guide - Page 62
Running Diagnostics Program, Run the RTC Function Test program.
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Running Diagnostics Program 1. RTC Function Test Run the RTC Function Test program. 2. PIO Loop Back Test Insert PIO loopback fixture to main board PIO connect then run the testing program. 3. CD-ROM Function Test Insert a data CD to CD-ROM drive. Then check the CD-ROM drive function with CD-ROM Function Test. . 54 Chapter 2